I’m a security expert – 3 of the ‘worst cellphone mistakes’ could cost you

A SECURITY expert has revealed the worst possible mistakes smartphone users can make.

Whether you use Android or iPhone, it’s worth taking note as these errors could leave you with a costly bill.

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James, McQuiggan, a security awareness advocate at KnowBe4, told The U.S. Sun: “When it comes to our smartphones, we use them every day and almost can’t go a day without them.

“We get concerned if we lose them because of personal and sensitive data, not including our pictures and our connection to the digital world.

“Three security mistakes people make are not using the phone’s security features, not protecting your passcode when opening it in public, or installing applications from unknown locations.

“As a bonus, keep the phone’s operating system updated with the latest patches and app software updates.”

All of those mistakes could leave you with an unwanted bill.

Not protecting your passcode in public is a common flaw that was also flagged by a The Wall Street Journal investigation.

The report claims thieves target people with their smartphones visibly out in public.

If you don’t use Face ID or a six-digit code, all the criminal has to do is get close to you, memorize four numbers, and take your phone when you don’t suspect it.

The criminal can also use the memorized passcode to reset your Apple ID or access important accounts that may contain banking information.

McQuiggan’s advice to not download apps from unknown sources is also widely supported by other experts.

If you download from an official source like Apple’s App Store or the Google Play Store, it’s more likely the app will be legitimate.

Scam apps can steal your data and your money.

Lastly, McQuiggan’s advice to make use of your phone’s security features is easy and free to do.

Update your software whenever a security flaw is patched and turn on features that can save you from scams.

For example, Android users can make use of Google Play Protect which aims to save them from scam apps.